The gasses must escape through a helical clearance 'slot' created by the tolerancing of the male/female thread form. An oil-film need be only a few microns thick to be effective for lube/anti-corrosion - but how to judge the quantity to apply? How will the lube age? This all sounds a bit 'iffy' to me, if you're relying on a known gap to create a leak path and then, effectively, applying something which could change the path dimensions. Oh, and as an apprentice I was taught to NEVER apply oil to a threaded bolt or nut, as it affects the holding capacity; a thread is in reality a helical wedge.
Alan
